Means for discharging-pulverized material from bins, &amp;c.



J. E. KENNEDY.

MEANS FOR DISCHARGING PULVERIZED MATERIAL FROM B|N5,&c.

I APPLICATION FILED MAR. 16. I91]- 1,288,025. Patented Dec. 17', 1918.

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MEANS FOR DISCHARGING PULVERIZED MATERIAL FROM BINS, &o.

Specification of Letters Patent.

Patented Dec. 17, 1918.

Application filed Kai-ch 16. 19 17. Serial No. 155,307.

To all whom z't-may concern:

Be it known that I, JOSEPH E. KENNEDY, a citizen of the United States,and a resident of the borough of Manhattan, city, county, and State ofNew York, have invented certain new and useful Improvements in Means forDischarging Pulverized Material from Bins, &c., of which the followingis a specification.

The object of my invention is to insure an even, uniform feed, both asto quantity and pressure, of reduced or comminuted material from astorage bin or similar receptacle irrespective of the mass of materialcontained in said holder. Difficulty has heretofore been experienced incontrolling and counteracting the pressure exerted by the material in astorage receptacle of this character, especially when the same is full,or approximately so, because under such conditions the excess of weighttends constantly to force the material through the exit much morerapidly than is desirable, whereas when the level of material in the binis low, the pressure will obviously be materially reduced, even possiblybelow that suiiicient to effect a continuous flow in adequate quantity.

I obviate this difiiculty by my invention which consists essentially ininterposing be tween the exit and the bin a discharge cham-- ber housingrotatable screw feed mechanism which receives the pulverized materialfrom apertures in the floor of the bin and trans fers it to saidexit,the weight of material in the bin being sustained by the floorplate thereof, which also constitutes the top of the said dischargechamber, and the screw feed positively conveying the material to theexit at an even speed and uniform pressure, all as hereinafter morefully set forth.

In the accompanying drawings,

Figure 1, is an elevation of the lower portion of a bin or container fordisintegrated material provided with my means for discharging thecontents thereof;

Fig. 2, is a horizontal section taken upon plane of line 22, Fig. 1;

Fig. 3, is a horizontal section taken upon plane of line 3*3, Fig. 1;

Fig. 4, is a vertical section taken upon plane of line 4l, Fig. 2.

The convergent lower side walls 6, b, of the bin or similar receptacleB, for holding and dispensing pulverized material, cause the descent ofsuch material by gravity to the floor plate I), which also constitutesthe top plate of the discharge feed chamber (1, in which is situated thepositive feed screw mechanism by which the pulverized material isconveyed from the apertures b b (Fig. 2) in said floor plate Z), to theexit c, in the bottom plate 03, of the discharge chamber d,-said exit 0,being provided with a spout or chute e, by which the discharged materialmay be delivered to auxiliary apparatus of various kinds and for variouspurposes.

The positive screw feed mechanism consists preferably of two parallelscrew conveyers 0, c, of like pitch and inclination. These extend oneither side of the exit 6, and convey the pulverized material whichdescends through the apertures N, in the plate 5, in o posite directionsto said exit 6. If the latter liecomes clogged for any reason the screwconveyers c, a, simply cause the material in the discharge chamber (3,to circulate from one end thereof to the other, back and forth, untilthe obstruction abates,-the feed to the exitvc,-thus being continuousregardless of the condition of the latter, and the screw oonveyers c, c,taking no more from the bin apertures 6 12 than they can dispose of.Furthermore this provision for circulation of material within thedischarge chamber d, relieves the pres sure and prevents the crowdingand forcing of material through the exit 0, when not disposed of ratus.

The bin apertures 6 6 are of a combined area aggregating approximatelythat of the exit e, so that the floor plate 6, which may be designatedthe pressure relief plate, sustains the major part of the weight of themass of comminuted material in the receptacle B, thereby obviating unduecompactness and congestion, and affording the least possible degree ofresistance to the operation of the oonveyers 0, c, and permitting themto feed the material to the exit e, in relatively loose, uniformcondition, which is a pre-requisite for effective service in theauxiliary apparatus.

The bin apertures 6 6 are by preference out of coincidence with the exit6, so that there is no possibility of the contents of the bin exercisingdirect pressure on the material ejected through said exit 6.

The screw oonveyers may be mounted and rotated in opposite directions byany suitable means. By way of illustration in the promptly by theauxiliary appadrawings they are connected by intermeshing gears g, g,and driven by a pulley p.

It is to be noted that by my method of efferting the discharge of thecomminuted material the latter is withdrawn from the bin only asrequired, and that while the feed to the exit w, is positive in thesense that material is always presented thereto, still it is notabsolutely imperative in that undue resistance to exit will beautomatially met and remedied by the continuous circulation of thematerial in the discharge hamher 1/. by means of the screw conveyers c,0. Furthermore, there can be no flooding of the material into thedischarge chamber. nor passage therethrough faster or slower than at thespeed and quantity prescribed by the screw conveyers c, 0, so that adefinite amount et' material is abstracted from the hopper and ejectedfrom the dis charge rhamber at an even speed. which is an importantfactor in various arts in which my system of delivering comniinutedmaterial may be employed.

1 have herein shown and described my discharge chamber (Z, as situatedimmediately below the pressure relief floor plate Leashes 7), of thebin, although I do not limit my self thereto, sinte communicationbetween the lower part of the bin and said discharge chamber (Z, is theessential feature in this respect, in conjunction with the interpositionof a pressure relief plate through which such eomnmnieation is effected.

What I claim as my invention and desire to secure by Letters Patent is,

Means for discharging pulverized material t'rom bins, comprising a floortherefor consisting of a pressure relief plate formed with openings, adischarge rhan'iber underneath said relief plate formed with a dischargespout misregistering or out of coincidence with the said openings in therelief plate above, parallel screw eonveyers threaded in the samedirection positioned in said discharge chamber, and means for rotatingsaid screw conveyers in opposite directions, whereby a circulation ofmaterial in the discharge chamber is eifected, for the purposedescribed.

JOSEPH E. KENNEDY.

Witnesses MARGARET L. KINDT, MARGARET M. NOLAN.

